. Canadian foundryman (1921). M t>3 b2 by Fig. 6 December, 1921 CANADIAN FOUNDRYMAN 19. Fig. 7 Turn the piece for course, bottom sideup; then lay out a circle the full size of hubon line between courses one and two. Fromthe center of this circle draw a radial lineb c, Fig 4. This line is the face of the back face lay on the templet, beingsure to have the center coincide with thecenter of course. A good way to accomplish this is to borea hole an eighth of an inch in diameterthrough the center of each course, then usepiece of wire that will fit this hole to centereach course. Now b
. Canadian foundryman (1921). M t>3 b2 by Fig. 6 December, 1921 CANADIAN FOUNDRYMAN 19. Fig. 7 Turn the piece for course, bottom sideup; then lay out a circle the full size of hubon line between courses one and two. Fromthe center of this circle draw a radial lineb c, Fig 4. This line is the face of the back face lay on the templet, beingsure to have the center coincide with thecenter of course. A good way to accomplish this is to borea hole an eighth of an inch in diameterthrough the center of each course, then usepiece of wire that will fit this hole to centereach course. Now bring the face of templetto the radial line b c Fig. 4, and mark thewidth at circumference. The width at lineg h Fig. 4. will be seen at c d Fig. 6. The pitchat this point is shown by line g h, and thegeneral outline of back side of blade by cur-ved line g i h. As the blade tapers in thick-ness from this point to circumference, theline of back should be curved from thispoint to end of blade like e Fig 4. Layoutthe fillet between blade and hub as at band k, draw a line b m from center of
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfoundri, bookyear1921
